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Play with XMLReader and full implemented Handler APIs.
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‎Chapter15/SAXDemo.java‎

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import java.io.FileReader;
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import java.io.IOException;
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import org.xml.sax.XMLReader;
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import org.xml.sax.Attributes;
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import org.xml.sax.InputSource;
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import org.xml.sax.Locator;
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import org.xml.sax.SAXException;
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import org.xml.sax.SAXParseException;
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import org.xml.sax.helpers.XMLReaderFactory;
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import org.xml.sax.ext.DefaultHandler2;
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public class SAXDemo{
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public static void main(String[] args) throws SAXException, IOException{
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if(args.length<1 || args.length>2){
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System.err.println("usage: java SAXDemo xmlFile [v]");
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return;
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}
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XMLReader xmlr = XMLReaderFactory.createXMLReader();
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if(args.length==2 && args[1].equalsIgnoreCase("v")){
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xmlr.setFeature("http://xml.org/sax/features/validation", true);
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}
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xmlr.setFeature("http://xml.org/sax/features/namespace-prefixes", true);
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Handler handler = new Handler();
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xmlr.setContentHandler(handler);
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xmlr.setDTDHandler(handler);
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xmlr.setEntityResolver(handler);
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xmlr.setErrorHandler(handler);
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xmlr.setProperty("http://xml.org/sax/properties/lexical-handler", handler);
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xmlr.parse(new InputSource(new FileReader(args[0])));
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}
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}
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class Handler extends DefaultHandler2{
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private Locator locator;
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@Override
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public void characters(char[] ch, int start, int length){
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System.out.print("characters() [");
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for(int i=start;i<start + length;i++){
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System.out.print(ch[i]);
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}
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System.out.println("]");
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}
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@Override
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public void comment(char[] ch, int start, int length){
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System.out.print("comment() [");
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for(int i=start;i<start + length;i++){
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System.out.print(ch[i]);
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}
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System.out.println("]");
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}
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@Override
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public void endCDATA(){
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System.out.println("endCDATA()");
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}
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@Override
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public void endDocument(){
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System.out.println("endDocument()");
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}
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@Override
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public void endDTD(){
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System.out.println("endDTD()");
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}
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@Override
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public void endElement(String uri, String localName, String qName){
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System.out.print("endElement() ");
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System.out.print("uri=" + uri);
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System.out.print(", localName=" + localName);
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System.out.println(", qName=" + qName);
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}
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@Override
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public void endEntity(String name){
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System.out.printf("endEntity() name=%s%n", name);
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}
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@Override
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public void endPrefixMapping(String prefix){
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System.out.printf("endPrefixMapping() prefix=%s%n", prefix);
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}
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@Override
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public void error(SAXParseException saxpe){
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System.out.println("error() " + saxpe);
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}
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@Override
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public void fatalError(SAXParseException saxpe){
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System.out.println("fatalError() " + saxpe);
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}
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@Override
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public void ignorableWhitespace(char[] ch, int start, int length){
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System.out.print("ignorableWhitespace() [");
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for(int i=start;i<start + length;i++){
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System.out.print(ch[i]);
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}
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System.out.println("]");
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}
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@Override
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public void notationDecl(String name, String publicId, String systemId){
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System.out.printf("notationDecl() name=%1$s, publicId=%2$s, systemId=%3$s%n", name, publicId, systemId);
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}
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@Override
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public void processingInstruction(String target, String data){
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System.out.printf("processingInstruction() target=%1$s, data=%2$s%n",
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target, data);
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}
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@Override
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public InputSource resolveEntity(String publicId, String systemId){
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System.out.printf("resolveEntity() publicId=%1$s, systemId=%2$s%n",
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publicId, systemId);
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// Do not perform a remapping.
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InputSource is = new InputSource();
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is.setPublicId(publicId);
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is.setSystemId(systemId);
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return is;
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}
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@Override
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public void setDocumentLocator(Locator locator){
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this.locator = locator;
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System.out.println("setDocumentLocator() locator=" + locator);
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}
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@Override
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public void skippedEntity(String name){
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System.out.println("skippedEntity() name=" + name);
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}
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@Override
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public void startCDATA(){
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System.out.println("startCDATA()");
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}
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@Override
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public void startDocument(){
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System.out.println("startDocument()");
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}
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@Override
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public void startDTD(String name, String publicId, String systemId){
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System.out.printf("startDTD() name=%1$s, publicId=%2$s, systemID=%3$s%n",
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name, publicId, systemId);
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}
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@Override
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public void startElement(String uri, String localName, String qName, Attributes attributes){
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System.out.print("startElement() uri=" + uri);
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System.out.print(", localName=" + localName);
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System.out.println(", qName=" + qName);
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for(int i=0;i<attributes.getLength();i++){
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System.out.println("Attribute: " + attributes.getLocalName(i) + ", " + attributes.getValue(i));
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}
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// Explores the position of the element start.
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System.out.println("Column number=" + locator.getColumnNumber() + ", line number=" + locator.getLineNumber());
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}
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@Override
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public void startEntity(String name){
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System.out.println("startEntity() name=" + name);
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}
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@Override
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public void startPrefixMapping(String prefix, String uri){
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System.out.printf("startPrefixMapping() prefix=%1$s, uri=%2$s%n", prefix, uri);
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}
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@Override
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public void unparsedEntityDecl(String name, String publicId, String systemId, String notationName){
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System.out.printf("unparsedEntityDecl() name=%1$s, publicId=%2$s, systemId=%3$s, notationName=%4$s%n");
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}
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@Override
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public void warning(SAXParseException saxpe){
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System.out.println("warning() " + saxpe);
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}
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}

‎Chapter15/svg-examples.xml‎

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<?xml version="1.0"?>
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<svg-example>
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<example>
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The following Scaleable Vector Graphics document describes a blue-filled and black-
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stroked rectangle.
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<![CDATA[<svg width="100%" height="100%" version="1.1"
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xmlns="http://www.w3.org/2000/svg">
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<rect width="300" height="100"
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style="fill:rgb(0,0,255);stroke-width:1; stroke:rgb(0,0,0)"/>
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</svg>]]>
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</example>
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</svg-example>

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